The transparent anterior structure that covers a colored segment of the eye, and provides most of an eye’s optical power. If it is not clear- vision is not clear.


Pigmented tissue situated behind the cornea that

  • gives color to the eye
  • controls the amount of light entering the eye by changing the pupil size


The round opening in the center of the iris. It appears as a black circle. Along with Iris, it regulates the amount of light that enters the eye.


The natural transparent lens inside of the eye. It helps focus light in the back of the retina. With age, the lens becomes foggy and will be called a “cataract”.


Clear, gelatinous mass. It fills the internal posterior part of the eye between the lens and retina.


Connects the eye to the brain and carries visual impulses/information from the retina to the brain. Glaucoma affects the structure of the eye.


The posterior part of the eye converts what we see into electrical impulses and it is sent via the optic nerve to the brain.


The small, specialized central area of the retina is responsible for color vision and sharpness of central vision.